package ipaintplugin.editors;

import ipaintplugin.actions.BaseToolAction;
import ipaintplugin.actions.DrawRedoAction;
import ipaintplugin.actions.DrawUndoAction;

import java.util.Vector;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchActionConstants;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.ide.IDEActionFactory;
import org.eclipse.ui.part.MultiPageEditorActionBarContributor;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.ui.texteditor.ITextEditorActionConstants;

/**
 * Manages the installation/deinstallation of global actions for multi-page
 * editors. Responsible for the redirection of global actions to the active
 * editor. Multi-page contributor replaces the contributors for the individual
 * editors in the multi-page editor.
 */
public class MultiPaintEditorContributor extends
		MultiPageEditorActionBarContributor {

	private static final String FIGURE_EXTENSION_POINT_ID = "ipaintplugin.figure";
	private IEditorPart activeEditorPart;
	private Vector<BaseToolAction> actions;
	private Vector<IAction> sActions;

	/**
	 * Creates a multi-page contributor.
	 */
	public MultiPaintEditorContributor() {
		super();
		actions = new Vector<BaseToolAction>();
		sActions = new Vector<IAction>();
		createActions();
	}

	/**
	 * Returns the action registed with the given text editor.
	 * 
	 * @return IAction or null if editor is null.
	 */
	protected IAction getAction(ITextEditor editor, String actionID) {
		return (editor == null ? null : editor.getAction(actionID));
	}

	/*
	 * (non-JavaDoc) Method declared in
	 * AbstractMultiPageEditorActionBarContributor.
	 */

	public void setActivePage(IEditorPart part) {
		if (activeEditorPart == part)
			return;

		activeEditorPart = part;

		IActionBars actionBars = getActionBars();
		if (actionBars != null) {

			ITextEditor editor = (part instanceof ITextEditor) ? (ITextEditor) part
					: null;

			actionBars.setGlobalActionHandler(ActionFactory.DELETE.getId(),
					getAction(editor, ITextEditorActionConstants.DELETE));
			actionBars.setGlobalActionHandler(ActionFactory.UNDO.getId(),
					getAction(editor, ITextEditorActionConstants.UNDO));
			actionBars.setGlobalActionHandler(ActionFactory.REDO.getId(),
					getAction(editor, ITextEditorActionConstants.REDO));
			actionBars.setGlobalActionHandler(ActionFactory.CUT.getId(),
					getAction(editor, ITextEditorActionConstants.CUT));
			actionBars.setGlobalActionHandler(ActionFactory.COPY.getId(),
					getAction(editor, ITextEditorActionConstants.COPY));
			actionBars.setGlobalActionHandler(ActionFactory.PASTE.getId(),
					getAction(editor, ITextEditorActionConstants.PASTE));
			actionBars.setGlobalActionHandler(ActionFactory.SELECT_ALL.getId(),
					getAction(editor, ITextEditorActionConstants.SELECT_ALL));
			actionBars.setGlobalActionHandler(ActionFactory.FIND.getId(),
					getAction(editor, ITextEditorActionConstants.FIND));
			actionBars.setGlobalActionHandler(
					IDEActionFactory.BOOKMARK.getId(), getAction(editor,
							IDEActionFactory.BOOKMARK.getId()));
			actionBars.updateActionBars();
		}
	}

	private void createActions() {

		sActions.add(new DrawUndoAction());
		sActions.add(new DrawRedoAction());

		IConfigurationElement[] config = Platform.getExtensionRegistry()
				.getConfigurationElementsFor(FIGURE_EXTENSION_POINT_ID);

		for (IConfigurationElement e : config) {
			try {
				actions.add((BaseToolAction) e
						.createExecutableExtension("actionClass"));
			} catch (CoreException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}
		}
	}

	public void contributeToMenu(IMenuManager manager) {
		IMenuManager menu = new MenuManager("Editor &Menu");
		manager.prependToGroup(IWorkbenchActionConstants.MB_ADDITIONS, menu);
		for (BaseToolAction a : actions)
			menu.add(a);

		for(IAction a : sActions)
			menu.add(a);
	}

	public void contributeToToolBar(IToolBarManager manager) {
		manager.add(new Separator());
		for (BaseToolAction a : actions)
			manager.add(a);
		
		for(IAction a : sActions)
			manager.add(a);
	}
}
